Exam 15: Parasitism

Smaller spider species which steal food from the webs of larger species are known as

If the transmission rate of a disease, B, is 0.02 and the average period of time over which the host remains infectious, L, is 0.1, what is the number of susceptible hosts needed to maintain a steady parasite population?

Human influenza is similar to influenza found in hogs and birds.

Which is not an invasive parasite that has caused massive mortality to native hosts?

Gammarus amphipods not infected by acanthocephalan worms are normally attracted to light and swim toward the top of the water column.

Which of the following organisms can be considered as microparasites?

Innate and acquired immunity in animals are analogous to constitutive and induced defenses in plants.

Which type of natural enemy is immediately fatal for its host?

When an organism feeds on another but normally does not kill it outright it is termed a _______.

The frequency of malaria in humans in Africa decreases with increasing elevation.